Clutch.



W. M. MMEBMAN.

oLU'ron. APPLIOTIOPILBD IAB. 3, 1908.

mentenI sepa 29, 19o&

UNITED sTAr-Esminrnnr onirica.

WILLIAM M. AMMERMAN, OF NEW HAVEN, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGNMENTS, TO ANNIE ELIZABETH AVERY, ADMINISTRATRIX.

CLUTCH.

Specication of Letters Patent.

Application led March 3, 1906.

Patented Sept. 29, 1908.

Serial No. 303,950.

in Clutches, of which the following is a specification.

This invention relates to improvements in l clutches and has more particular reference to improvements in that class of clutches adapted for effecting connection and disconnection between the hand-wheel of a sewing machine, which is made fast to the sewing machine driving. shaft, and the driving belt- Wheel or pulley Which is mounted on the machine adjacent to said hand-wheel and which receives its motion from a suitable source of power through the medium of a belt.

The ob 'ect of the invention is to provide an improve clutch, adapted for general use but more particularly for use in connectiony with sewing machines as above referred to, which will be simple in construction, effective in operation, and capable of ready and convenient adjustment. These objects are attained in a preferred embodiment of my invention lby means of a clutch element made in the form of a rocker-cam supported in the A hand-wheel hub and being movable to and from an operative position `of clutching engagement with the belt-wheel hub, and a clutch-operating element made in the form of a capl rotatably mounted on the outer end of the and-wheel hub and having operative connection with the said clutch element.

Referring now to the accompanying drawing illustratin my invention and which forms a part o this s ecilication-Figure 1 is a front elevation of tlie rear end of a sewing machine broken away and having my improved clutch applied thereto. Fig. 2 is an enlarged detail end view of the central clutch embodyin ortions of the sewing machine hand and e t Wheels, lookin from the right in Fig: 1 and showingl the c utch-operatin element. Fig. 3 is a central longitudina section through the said clutch embodying portions of the hand and belt wheels shown 1n Fig. 2. Figs. 4 and5 are cross-sections on the line :zn-a: of 3 showing the clutch element in clutching and-unclutching positions respectively. Fig. 6 is a detail view of the clutch operating or adjusting yelement looking toward the inner end thereof, and Fig. 7 is a detail view of the clutch element.

In said drawings, 1 indicates a portion of a sewing machine arm in the upperpart of which is journaled the sewing machine driving shaft 2 which is arran ed with one end thereof projecting beyond 51e end of the arm 1 and having mounted thereon the handwheel 3 and the belt-wheel 4, the said handwheel being made fast to the shaft and the belt-wheel being loose thereon and adapted to be clutched to and unclutched from said hand-wheel whereby it may be caused to either impart motion to the machine o'r to run independent thereof when the bobbinwinding attachment 5 is to be operated. These several parts 1 to 5, as described, are of usual arrangement and operation, exceptin as hereinafter sA ecified.

he hand-whee 3 is provided with the usual centrally located hub to receive the driving shaft, which hub in the present case projects at each side ofthe wheel, with the end 6 at vthe inner side of the wheel being somewhat more extended thanthe op osite end 7 at the outer side of the wheel an having rotatably mounted thereon vthe belt- Wheel 4. Within a partially cylindrical shaped seat 8 formed in the hub of the handwheel parallel with its axis and opening through the outer surface of the hub o posite the inner wall 9 of the belt-wheel hu 10 is loosely seated the clutch element 11. This clutch element as shown is made in the form ."of a rocker-cam so designed as to lie wholly *within the plane of the outer surface of the hub 6 and awa from engagement with the wall 9 of the elt-wheel hub when in unclutching position, as shown in Figs. 3 -and 5, or tovpartially roject above the plane of the surface of the ub 6 and en age with the said wall 9 of the belt-wheel Iiub when in clutching osition, as shown in Fig. 4. As a simdple an effective means for operating the sai rocker-cam to move it to and from its operative osition of clutching engagement with the belt-wheel, I have provided the same at its outer end with a crank-arm or extension 12 which has a pin-and-slot connection with an operating cap-piece 13 rotatably mounted on the outer end 7 of the hand-wheel hub 3 the said pin-and-slot connection between the crank-arm and the cappiece as herein shown comprising a pin 14 `mountedl on thecrank-arm extending'into an elongated slot 15 in the cap-piece. By turning the cap-piece 13 in the proper' direction it will operate through the connecting crankarm 11 to move or rock the clutch cam either to or from its operative clutching position, in manner as clearly illustrated in Figs. f1 and.

The clutch-operating cap-piece 13 may be o eratively retained in positlon on the hand- Wlheel hub 7 by any suitable means, the means employed for such purpose in the resent case comprising an inwardly-turned ip 16 on the ca piece engaging the hub 7 Within an annu ar groove 17 therein, as clearly shown in Fig. 3; such connection serving to hold the cap-piece against endwise dlsplacement on theI hub while perinitting its rotary movement thereon.

What I'claim is:

1. The combination of a shaft, a Wheel connected thereto to rotate therewith, said Wheel having a' hub formed with a longitudinal seat, an element rotatably mounted on said hub, a clutch comprising a rocker cam supported iii-said' 'seat and extending Within the hub ofi, said rotatable element, said clutch being vmovable to and from an operative position' of-cliitching engagement with said .rotatable`-j elment, a cap rotatably fon-.theghub of said Wheel and a "between said cap and 2. The V,tio-nef a Wheel having a hu'b, a sgcondwhe'el rotatably mounted on one endjr'saidfhub, a `clutch comprising a rocker-cani mountedin the -hub of the irstmentioned tvlie'el and being movable to and vfromfan .operative -position of clutching engagement With Athe second-mentioned Wheel,

.and `acap rotatably mounted-fon the end of of the'ir'st-irnentioned Wheel opposite to that carrying said second Wheel and having col'inection with the sald cam for moving it to and from its said operative position. y

3. A sewing machine hand-Wheel having a hub projectingr at each side thereof, said hub having a longitudinal seat, a belt-wheel or pulley rotatably mounted on the hub of said hand-Wheel at one side thereof and covering said seat, a cap rotatably mounted on the hub of the handewheel at that side thereof opposite the said belt-wheel, and a clutch comprising a rocker-cam mounted. ,in the seat in the hub of the hand-Wheel and extending Within the hub of the belt Wheel and being movable to and from an operative position of clutching engagement with the beltwheel and having connection with the said rotatable cap to be operated thereby.

4. The combination of a sewing machine hand-Wheel having a hub projecting at each side thereof, a belt-Wheel or ulley rotatably mounted on the hub of said3 hand-Wheel at one side thereof, a cap rotatably mounted on the hub of said hand-Wheel at that side thereof opposite the said belt-Wheel, means for holding the cap against endWise displacement from the hand-wheel hub, and a clutch comprising a rocker-cam mounted in the hub of the hand-Wheel and being movable to and from an operative position of clutching engagement With the belt-Wheel and having connection With the said cap to be operated thereby.

Signed at New Haven in the county of 'New Haven and State of Connecticut this Witnesses:

FRANCES I. MARTIN, HENRY W. IBELsHAUsER. 

